/Engine/Source/Runtime/UMG/Public/Blueprint/UserWidget.h
Called when an analog value changes on a button that supports analog
Returns whether the event was handled, along with other possible actions
[FEventReply](API\Runtime\UMG\Components\FEventReply) OnAnalogValueChanged ( [FGeometry](API\Runtime\SlateCore\Layout\FGeometry) MyGeometry, [FAnalogInputEvent](API\Runtime\SlateCore\Input\FAnalogInputEvent) InAnalogInputEvent )